An excellent introductory kit that allows you to explore circuitry, electronics, and soldering all while completing a fun experiment that yields a small flashing LED, programmed by the circuit you've just built!

Build your own line-tracking car with this fun DIY solder kit! Once completed, the car uses two optical sensors to detect contrast between light and dark; thus, if you draw a thick line on a sheet of white paper, the car will track the line and drive around on the path you've indicated.

Write secret messages to your friends in the know, keep diary entries safe from prying eyes with light-coded messages, and leave invisible tags in school notebooks with this handy and affordable invisible ink pen!

A fully functional stirling engine model operates solely from the power provided by the heat of the surface on which it is placed, meaning it works especially well placed over the rim of a piping-hot mug of coffee

Slag is the glass-like by-product left over after a desired metal has been separated from its raw ore. Slag is usually a mixture of metal oxides and silicon dioxide; however, slags can contain metal sulfides and elemental metals